GB1571694A - Passivatin metal surfaces - Google Patents
Passivatin metal surfaces Download PDFInfo
- Publication number
- GB1571694A GB1571694A GB10025/77A GB1002577A GB1571694A GB 1571694 A GB1571694 A GB 1571694A GB 10025/77 A GB10025/77 A GB 10025/77A GB 1002577 A GB1002577 A GB 1002577A GB 1571694 A GB1571694 A GB 1571694A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- acid
- passivating
- alkali metal
- complexing agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229910052751 metal Inorganic materials 0.000 title claims description 13
- 239000002184 metal Substances 0.000 title claims description 13
- 239000000243 solution Substances 0.000 claims description 94
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 38
- 239000002253 acid Substances 0.000 claims description 36
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 26
- 239000008139 complexing agent Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 24
- 239000002585 base Substances 0.000 claims description 22
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 16
- 239000001301 oxygen Substances 0.000 claims description 16
- 229910052760 oxygen Inorganic materials 0.000 claims description 16
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 15
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 14
- -1 alkali metal gluconates Chemical class 0.000 claims description 13
- 229910052742 iron Inorganic materials 0.000 claims description 13
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 229910052783 alkali metal Inorganic materials 0.000 claims description 11
- 150000007513 acids Chemical class 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 8
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 7
- 230000003472 neutralizing effect Effects 0.000 claims description 7
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 7
- 239000000176 sodium gluconate Substances 0.000 claims description 7
- 229940005574 sodium gluconate Drugs 0.000 claims description 7
- 235000012207 sodium gluconate Nutrition 0.000 claims description 7
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 6
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 5
- 150000002169 ethanolamines Chemical class 0.000 claims description 5
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 4
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 229960001484 edetic acid Drugs 0.000 claims description 3
- 229910000288 alkali metal carbonate Inorganic materials 0.000 claims description 2
- 150000008041 alkali metal carbonates Chemical class 0.000 claims description 2
- 150000008044 alkali metal hydroxides Chemical class 0.000 claims description 2
- 150000001340 alkali metals Chemical class 0.000 claims description 2
- 229910021538 borax Inorganic materials 0.000 claims description 2
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 2
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 2
- UEUXEKPTXMALOB-UHFFFAOYSA-J tetrasodium;2-[2-[bis(carboxylatomethyl)amino]ethyl-(carboxylatomethyl)amino]acetate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]C(=O)CN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O UEUXEKPTXMALOB-UHFFFAOYSA-J 0.000 claims description 2
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 239000000126 substance Substances 0.000 description 14
- 239000011521 glass Substances 0.000 description 7
- 238000002161 passivation Methods 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 5
- 239000012670 alkaline solution Substances 0.000 description 5
- 239000011734 sodium Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 4
- 239000012298 atmosphere Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 230000008030 elimination Effects 0.000 description 4
- 238000003379 elimination reaction Methods 0.000 description 4
- 150000007529 inorganic bases Chemical class 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 150000007530 organic bases Chemical class 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- RGHNJXZEOKUKBD-SQOUGZDYSA-M D-gluconate Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O RGHNJXZEOKUKBD-SQOUGZDYSA-M 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000001464 adherent effect Effects 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000011260 aqueous acid Substances 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229940050410 gluconate Drugs 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- 239000012085 test solution Substances 0.000 description 2
- 125000006539 C12 alkyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 description 1
- RGHNJXZEOKUKBD-SQOUGZDYSA-N Gluconic acid Natural products OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 150000001642 boronic acid derivatives Chemical class 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000174 gluconic acid Substances 0.000 description 1
- 235000012208 gluconic acid Nutrition 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000002198 insoluble material Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- HLWRUJAIJJEZDL-UHFFFAOYSA-M sodium;2-[2-[bis(carboxymethyl)amino]ethyl-(carboxymethyl)amino]acetate Chemical compound [Na+].OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC([O-])=O HLWRUJAIJJEZDL-UHFFFAOYSA-M 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/60—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using alkaline aqueous solutions with pH greater than 8
- C23C22/62—Treatment of iron or alloys based thereon
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Chemical Treatment Of Metals (AREA)
- Detergent Compositions (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/666,855 US4045253A (en) | 1976-03-15 | 1976-03-15 | Passivating metal surfaces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1571694A true GB1571694A (en) | 1980-07-16 |
Family
ID=24675773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10025/77A Expired GB1571694A (en) | 1976-03-15 | 1977-03-09 | Passivatin metal surfaces |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4045253A (enrdf_load_html_response) |
| JP (1) | JPS52111834A (enrdf_load_html_response) |
| AU (1) | AU520814B2 (enrdf_load_html_response) |
| CA (1) | CA1081096A (enrdf_load_html_response) |
| DE (1) | DE2711056A1 (enrdf_load_html_response) |
| FR (1) | FR2344645A1 (enrdf_load_html_response) |
| GB (1) | GB1571694A (enrdf_load_html_response) |
| IT (1) | IT1085520B (enrdf_load_html_response) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2210900A (en) * | 1987-10-13 | 1989-06-21 | Nihon Parkerizing | Phosphate coatings on metals |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2942903A1 (de) * | 1979-10-24 | 1981-05-07 | Chemische Werke Hüls AG, 4370 Marl | Kavitationshemmende, frostsichere kuehl- bzw. waermeuebertragungsfluessigkeiten |
| DE3032226A1 (de) | 1980-08-27 | 1982-04-01 | Henkel KGaA, 4000 Düsseldorf | Verfahren und mittel zum passivieren von eisen- und stahloberflaechen |
| US4590100A (en) * | 1983-10-28 | 1986-05-20 | The United States Of America As Represented By The Secretary Of The Navy | Passivation of steel with aqueous amine solutions preparatory to application of non-aqueous protective coatings |
| JPH068914B2 (ja) * | 1986-10-20 | 1994-02-02 | 株式会社日立製作所 | 沸騰水型原子力プラントの放射性物質の付着抑制方法 |
| JP2508170B2 (ja) * | 1987-12-28 | 1996-06-19 | 石川島播磨重工業株式会社 | 原子炉配管等の表面処理方法 |
| JP2649107B2 (ja) * | 1991-03-08 | 1997-09-03 | 三浦工業 株式会社 | ボイラ用缶内処理剤組成物 |
| DE4312417A1 (de) * | 1993-04-16 | 1994-10-20 | Henkel Kgaa | Verfahren zur Erhöhung der Korrosionsbeständigkeit von nichtrostendem Stahl |
| DE69420474T2 (de) * | 1993-06-30 | 2000-05-18 | Applied Materials Inc | Verfahren zum Spülen und Auspumpen einer Vakuumkammer bis Ultra-Hoch-Vakuum |
| DE69534340T2 (de) * | 1994-09-26 | 2006-04-20 | Steris Inc., Temecula | Säurebehandlung von rostfreiem stahl |
| ATE253534T1 (de) * | 1994-09-26 | 2003-11-15 | Steris Inc | Alkalibehandlung von rostfreiem stahl |
| US6740168B2 (en) * | 2001-06-20 | 2004-05-25 | Dominion Engineering Inc. | Scale conditioning agents |
| EP1751068B1 (en) | 2004-04-01 | 2018-12-05 | Westinghouse Electric Company LLC | Improved scale conditioning agents and treatment method |
| JP4799908B2 (ja) * | 2005-05-30 | 2011-10-26 | 株式会社アルバック | 表面処理方法 |
| US7632458B2 (en) * | 2006-01-31 | 2009-12-15 | General Electric Company | Corrosion inhibitor treatment for closed loop systems |
| DE102007048750A1 (de) * | 2007-10-11 | 2009-04-16 | Schaeffler Kg | Verfahren zur Herstellung eines metallischen Bauteils, insbesondere eines Lagerbauteils oder Präzisionsbauteils, sowie verfahrensgemäß hergestelltes Bauteil |
| JP6301648B2 (ja) * | 2012-12-26 | 2018-03-28 | 宇部興産機械株式会社 | 耐候性鋼材の表面処理方法 |
| US20210265069A1 (en) * | 2020-02-24 | 2021-08-26 | Jubilant Draximage Inc. | Heat resistant generator columns for elution systems |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL252277A (enrdf_load_html_response) * | 1959-06-04 | |||
| US3067070A (en) * | 1961-02-01 | 1962-12-04 | Charles M Loucks | Cleaning method for industrial systems |
| CH458013A (de) * | 1964-03-21 | 1968-06-15 | Bayer Ag | Verfahren zum Korrosionsschutz von metallischen Gegenständen |
| US3272738A (en) * | 1964-06-17 | 1966-09-13 | Edgar C Pitzer | Process for the removal of metal corrosion products from a solution of hydrazine andethylenediaminetetracetic acid |
| US3460989A (en) * | 1964-09-02 | 1969-08-12 | John H Rusch | Method of treating ferrous metal surfaces |
| US3415692A (en) * | 1965-03-12 | 1968-12-10 | Combustion Eng | Method of passivating metal surfaces |
| US3447965A (en) * | 1966-10-31 | 1969-06-03 | Dow Chemical Co | Removal of copper containing scale from ferrous surfaces |
| US3677827A (en) * | 1969-09-09 | 1972-07-18 | Oxford Chem | Composition and method for blackening metal articles |
| US3901651A (en) * | 1971-06-07 | 1975-08-26 | Aquaphase Lab Inc | Treating water to retard corrosion |
| JPS5221456B2 (enrdf_load_html_response) * | 1971-08-21 | 1977-06-10 | ||
| US3783035A (en) * | 1972-05-15 | 1974-01-01 | Olin Corp | Coating ferrous metals |
| US3951681A (en) * | 1973-11-01 | 1976-04-20 | Kolene Corporation | Method for descaling ferrous metals |
| NL7406745A (nl) * | 1974-05-20 | 1975-11-24 | Optische Ind De Oude Delft Nv | Filmtransportinrichting. |
-
1976
- 1976-03-15 US US05/666,855 patent/US4045253A/en not_active Expired - Lifetime
-
1977
- 1977-02-28 CA CA272,806A patent/CA1081096A/en not_active Expired
- 1977-03-09 GB GB10025/77A patent/GB1571694A/en not_active Expired
- 1977-03-14 DE DE19772711056 patent/DE2711056A1/de active Pending
- 1977-03-14 FR FR7707551A patent/FR2344645A1/fr active Granted
- 1977-03-15 IT IT21273/77A patent/IT1085520B/it active
- 1977-03-15 JP JP2853477A patent/JPS52111834A/ja active Pending
- 1977-03-22 AU AU23471/77A patent/AU520814B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2210900A (en) * | 1987-10-13 | 1989-06-21 | Nihon Parkerizing | Phosphate coatings on metals |
| GB2210900B (en) * | 1987-10-13 | 1991-11-20 | Nihon Parkerizing | Compositions and processes for forming phosphate coatings on metals |
Also Published As
| Publication number | Publication date |
|---|---|
| US4045253A (en) | 1977-08-30 |
| DE2711056A1 (de) | 1977-09-29 |
| CA1081096A (en) | 1980-07-08 |
| JPS52111834A (en) | 1977-09-19 |
| FR2344645A1 (fr) | 1977-10-14 |
| IT1085520B (it) | 1985-05-28 |
| FR2344645B1 (enrdf_load_html_response) | 1980-04-04 |
| AU2347177A (en) | 1978-09-28 |
| AU520814B2 (en) | 1982-03-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1571694A (en) | Passivatin metal surfaces | |
| US3522093A (en) | Processes of cleaning and passivating reactor equipment | |
| US3072502A (en) | Process for removing copper-containing iron oxide scale from metal surfaces | |
| US4406811A (en) | Composition and method for controlling corrosion in aqueous systems | |
| US4381950A (en) | Method for removing iron sulfide scale from metal surfaces | |
| US4452643A (en) | Method of removing copper and copper oxide from a ferrous metal surface | |
| US3699052A (en) | Corrosion inhibitor composition containing a glycine,chelating agent,phosphoric or boric acid ester,and a water soluble divalent metal salt | |
| KR100852071B1 (ko) | 개선된 스케일 컨디셔닝제 | |
| EP0086245B1 (en) | Aqueous acid metal cleaning composition and method of use | |
| US3460989A (en) | Method of treating ferrous metal surfaces | |
| WO1998021304A1 (en) | Liquid metal cleaner for an aqueous system | |
| US3003899A (en) | Removal of scale deposits | |
| US4623399A (en) | Solvent for removing iron oxide deposits | |
| KR101213379B1 (ko) | 개선된 스케일 컨디셔닝제 및 처리 방법 | |
| US4093566A (en) | Phosphate-free spray cleaner for metals | |
| US3506576A (en) | Metal cleaning solution of chelating agent and water-soluble sulfide | |
| US3297481A (en) | Cleaning and descaling process | |
| US3067070A (en) | Cleaning method for industrial systems | |
| US4861386A (en) | Enhanced cleaning procedure for copper alloy equipment | |
| US2318663A (en) | Composition and method for treating boiler water to prevent caustic embrittlement | |
| US3655582A (en) | Synergistic combination of silicates and barium salts for inhibiting the attack of alkaline solutions on aluminum containing materials | |
| KR100689569B1 (ko) | 가압경수로의 증기발생기를 세척하는 방법 | |
| US4636327A (en) | Aqueous acid composition and method of use | |
| US3415692A (en) | Method of passivating metal surfaces | |
| US2297670A (en) | Method of protecting boilers and the like against embrittlement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |